Improvement in stopping-mechanism for power-looms



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RASTUS B. BIGELOW, OF BOSTON, MASSACHUSETTS.

Letters PatentNo. 89,012, dated vApril 20, 1869.

IMPROVEMET IN' STOPPING-MECHANISM FOR POWER-LOOMS.

The Schedule referred to in these Letters Patent and making part: of the same.

To all whom 'it may concern:

Be it known that I, ERAs'rUs B. BIGnLoW, of Bostonin the county of Suffolk, and State of Massachusetts, have'invented a new and improved Stop-Motion for Power-Looms; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

-Figure 1 is an end elevation of a loom-flame, and of my improved stop-motion;

Figure 2, a front elevation thereof; and

Figure 3, a sectional plan, taken on the line .A B, in g. l.

My invention is particularly applicable to looms in which the shuttle-boxes arel detached from the lay, and in which the protecting-rod, or the rod which throws the loom ont of gear when the shuttle fails to enter its box, is also detached from the lay, and supported by stationary stands, as described in Letters Patent for improvements in power-looms for weaving' ingrain carpets, granted to me the 18th day of February, 1846.

In looms of this class, the protecting-rod is so counected with the'shuttle-binders and loom-shipper that when it is allowed to turn it will throw the loom out of gear.

This rod is acted upon by a cam, which is so shaped las to allow the rod to turn at the Atime the shuttle is intended to enter its shuttle-box, and to hold it from turning during the other portion of the operation of the loom, so that as long as the shuttle continues to properly enter its box, the shuttle-binder will hold the rod from turning, and the loom will continue in motion, but when the shuttle-fails to enter its box, the rod will turn, and throw the loom out of' gear.

A part of myinvention. relates to a mode of arrest-v ing the movement of the loom at a given point, when it is thrown out of gear by the failure of the shuttle to enter its box.

Another part relates to-a mode of withdrawing the stop-lever, which arrests the loom, preparatory tothe restarting of the loom.

Andanother part relates to a mode of diminishing the shock consequent upon suddenly stopping the loom.

The loom-frame is marked a in the several figures. I brepresents the protecting-rod, which extends across the loom, and tur'ns inthe stands c, affixed to the loomframe a.

To one end of this shaft an arm, d, extends forward, and is connected by a vertical rod, c, with a horizontal lever, f, which vibrates on a stud, g.

The lever f carries a cam-roller, h, which is actuated by a cam, t, on the lay-shaft j.

Nearly the entire surface of this cam is concentric, a small depression only being formed on one side of it, as shown in Figure 4, which allows the lever f to descend the instant after it is intended that .the shuttle shall have entered its shuttle-box.

From the protecting-rod b, arms k extend forward, and are acted upon by the shuttle-box binders in such mannerthat if the sh nttle properly enters its box, the shuttle-binder of the box thus entered will support its arm k, and prevent the protecting-rod b from turning, when the depressed part of the cam passes under the camroller h, and the loom will continue in motion; but whenever the shuttle fails td properly enter its box,

the arms k will be unsupported, and the depression in the cam will allow the protecting-rod b to turn and throw the loom out of gear.

The mode in which the protecting-rod b is caused to act on the loom-shipper, to throw the loom out of gear, and, also, the mode in which the arms 7c are caused to feel the shuttle-binders, are not represented in the drawings, as they forni no part of my present invention, and are fully described in the Letters Patent hereinbefore referred to. t

l represents a gear-wheel, which is afi'xed to the layshaft j, and has a. fixed stop, m, projecting from its inner side.

n represents alstop-lever, the upper end of which is suitably formed to engage with the stop m, while its lower end is pin-jointed to the upper end of a piston, marked o, so as to be capable of being moved into and out of contact with the stop m, the stand p serving to guide it and limit its movement. y

q represents a latch-lever, which vibrates on a -stud, r, and has its forward end so formed as by its weight to latch on to a projection, s, extending from the inner side of the stop-lever n, while its rear end is connected by a vertical rod, t, to an arm, u, extending from the protecting-rod b, the lower end of the vertical rod t, being provided with a slot, c, to allow the arm u to return toits positin, aftertripping the latchlever q, while the latch-lever q is unlatched.

These parts are represented in the drawings in the' position which they assume when the ioom is in action.

Now, suppose a shuttle to fail to enter its box, and the protecting-rod b is allowed to turn, and throw the loom out of gear, as before explained. The same turning of the protecting-rod b which throws the loom out of gear will, through the action of armar and connecting-rod t, trip the latch-lever q, and allow the weighted arm w of the stop-lever n to draw the upper end of the stop-lever n into the path of the xed stop lm, and

arrest the movement ofthe loom.

The next part of my invention to be described relates to the mode of withdrawing the stop-lever from the path of the fixed stop, preparatory to restarting the loom.

The loom, when stopped by the failure of the shuttle to properly enter its box, usually stops in such position' as to require it to be turned back for the adj ustment of the shuttle before it is restarted. Therefore the reversing-shipper, which brings the reversingmechanism into action, is employed to withdraw the stop-lever. l

The reversing shipper-shaft, marked x, is supported by stands y, and carries a reversing shipper-handle z, which is guided and limited in its range of motion by a guide-stand a', affixed to the loom-frame.

From the shaft x an arm, 7)', extends toward the loom, as shown in tig. 3, and has a connecting-rod c jointed to it, which rod is also loosely connected with an arm, d', extending from and aflixed to the lower end ofthe stop-lever n.

To bring the reversing-mechanism into action, the reversing shipper-handle z is moved by the weaver toward the loom, which movement depresses the arm b', and through the action of the nut e on the arm d withdraws the stop-lever n away from the path of the iixed stop in, while the latch-lever q latches on to the projection s, and holds it in position until it is again released by the protecting-rod b, as before described.

' rI he rod c is connected to the arm d by a, loose connection, so as to allow the reversing-shipper to return to its position without acting on the stop-lever yn, after it has been moved to pnt the reversing-mechanism in action.

The reversing-mechanism, and the mode of connecting it with the reversing-shipper, are not represented in the drawings, as they form no part of my present invention, und are fully described in the Letters Patent for improvements in jacquard looms, granted to me the 23d,day of October, 1849.

The next part of my invention, which relates to the mode of diminishing the shock consquent upon suddenly arresting the movement of the loom, may be understood as follows:

The piston o, to which the stop-lever n is jointed, as before described, is inserted in a cylinder, f', ai'lixed to the loom-frame, in which it may freely slide.

Below the piston, in the same cylinder, a cushion of vulcanized India rubber g is inserted, on which the bottom of the piston rests, as shown by a sectional view of the parts in Figure 5, the bore for the rubber being smaller than the bore for the piston, so as to furnish a shoulder for the piston to strike against, in case the rubber should not offer sucient resistance to stop the loom.

To prevent the piston from turning, a pin, i', is inserted in it, through a slot, h', in the cylinder, which also serves to prevent it from being raised too high by the rebound ofthe rubber. p

It will be obvious that my invention may undergo many changes in its form Iand arrangement, without departing from its distinguishing principles, as, for example, the fixed stop which strikes against the stoplever, instead of being iixed to a wheel on the lay-shaft, as above described, may be iixed to a shaft of the loom other than the lay-shaft, and, by changing the position of the stop-lever to conform therewith, the same effects may be produced as by the arrangement represented in the drawings, though the meansy employed would remain substantially the same.

So, in regard to the mode of diminishing the shock, instead of employing a cushion of vulcanized India rubber, as above specified, other elastic materials, or a metal spring, may be employed.

Having described my invention, and pointed out some of the modiiications'of which it is susceptible without departing from its distinguishing principles,

What I claim as new therein, and desire to secure by Letters Patent, is=

The combination of mechanism herein described for arresting the movement ofthe loom, when the shuttle fails to enter its box, consisting of a protecting-rod, disconnected from the lay, but connected with the loom-shipper, and operated by a cam, as herein described, and a stop-lever, which is caused to engage with a fixed stop on a moving part of the loom, substantially as described.

Also, the stop-lever for arresting the movement of the loom, in combination with a reversing-shipper, by which the reversing-mechanism is brought into action to reverse the motion of the loom, when the reversingshipper is employed to release'the stop-lever, substantially as described.

Also, an elastic cushion, or spring, in combination with the stop-lever, as herein described, when said stop-lever is brought into action by a protecting-rod and withdrawn by a reversing-shipper, substantially as specified.

E. B. BIGELOW.

Vitnesses:

HERBERT T. WHITMAN, E. F. BIGELOW. 

